Motherboard is Gigabyte EX58-UDR3, can't remember the rest of the system offhand. PC was running windows backup, and about 12 hours in (having backed up but not finished checking the backup) froze. On rebooding it will not enter POST, fires up for about 2 seconds then turns off and restarts. Nothing on the monitor. I've tried clearing the CMOS and removing the RAM, neither makes any difference. Any suggestions beyond it being a dead motherboard and in need of replacement? It's about 2 years old at this point, and I've never really overclocked it so a dead motherboard would be something of a disappointment.
Like neil said, try psu then if that has no effect try removing all peripherals including hdd etc see if you get post. Does your mobo have a safe cmos setting, perhaps a corrupt bios although I don't see how. Usually psu, ram, hdd. Do you get any beep codes our error lights displayed anywhere?
